Machine for shredding paper-stock.



G. D. RYTHER.

MACHINE FOR SHREDDING PAPER STOCK.

APPLICATION FILED APR. 15. 1915.

Patented Oct. 12, 1915.

2 SHEETSSHEET I.

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MACHINE FOR SHREDDING PAPER STOCK.

APPLICATION FILED APR. 15. I915.

1,156,373.. Patented 001. 12, 1915.

2 SHEETSSHEET 2.

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GEORGE D. RYTHER, 0F CARTHAGE, NEW YORK, ASSIGNOR TO RYTHER & PRINGLE(70., OF CARTHAGE, NEW YORK, A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented Oct. 12, 1915.

Application filed April 15, 1915. Serial N 0. 21,489.

To all whom it may concern:

Be it known that I, Gnonon D. RYTHER, a. citizen of the United States,and resident of Carthage, in the county of Jefferson and State of NewYork, have invented certain new and useful Improvements in Machines forShredding Paper-Stock, of which the following is a full, clear, andexact specification, reference being had to the accompanying drawing, inwhich- Figure l is a plan view; Figs. 2 and l are side elevations of myimproved shredding machine, and Fig. 3 a sectional view on line 33indicated in Fig. 1.. 15 I My invention relates to the art ofpapermaking, more particularly to machines for preparing dry paper stockfor the beaters,

and it consists of the hereinafter specified improvements in theconstruction of such machines, whereby a more complete disintegration ofthe paper stock is effected, interruptions in the working of the machineprevented, and its productive capacity in creased, without requiring acorresponding increase in the power for driving the machine. v

The paper stock shredding machine. constructed according to myinvention, in the form illustrated in the accompanying drawings.consists essentially of a suitable frame. like the frame 4 shown in thedrawings. whereon the operating parts are mounted. a stationary knife,mounted like the knife 8. in the frame in position to co-act with theseries of rotary knives. or saws, 9, mounted on the shaft 11. and whichare co-acting with the knife 8, and with the feeding mechanism. toeffect the disintegrating of the paper stock into coarse particles: aseries of stationary shredding blades, set underneath the stationaryknife 8, and in cooperative position with the rotary shredding knives.or saws. 9, whereby the coarse pieces of paper stock. produced by theco-aetion of the stationary knife 8 with the rotary knives, or saws. 9,and of suitable means for positively feeding the paper stock, arefurther disintegrated into finer particles (fibers).

The frame 4 of the machine is designed to support the severalcooperating parts of the machine, and the shafts. rolls and gears, intheir required position: the'stationary knife 3 is fixed in the rear ofthe frame 4. its cutting edge projecting into the path of the rotaryknives, or saws, 9, so the paper stock is subjected to the cutting andshearing coaction of these implements. as it is moved by thefeedingmechanism. The rotary knives, or saws, 9, are mounted on the shaft 11.pillowed in suitable airings +1,.'aflixed to the frame 4, and driven bya belt (not shown) passed over pulley 12 fixed thereon. lhey are set atan angle, deviating more or less from right angle to the axis of theshaft 11, whereby a corresponding lateral motion of their teeth isproduced when the shaft 11 is rotated. The knives, or saws, 9, arespaced by correspondingly shaped and dimensioned washers 11, wherebythey are fixed in their position on the shaft 11. By means of thesewashers 11", the angular deviation of the rotary knives, or saws,9,'from the axis of the shaft- 11, maybe varied, to conform to therequirement of the material worked upon in the machine.

In the rear end of the frame 4. and underneath the stationary knife 8, abedplate 14 is formed. concaved to correspond approximately to theperiphery of the rotary knives, or saws, 9. and the serrated,stationary. knife blades 10 are fixed therein with their teethprojecting into the spaces between the rotary knives, or saws, 9. Thestationary knife blades 10 are arranged parallel to each other. andspaced apart, the distance between them being determined by the extentof the lateral deviation of the rotary motion of the tcethed knives, orsaws, 9, co-acting with the serrated blades '10 upon the material to beshredded. and the required degree of its disintegration.

Owing to'the above-described position of the rotary knives. or saws, 9,relatively to the axis of the shaft 11, the points of these knives. orsaws. move, to a greater or less extent. transversely between the pointsof the stationary. knife-blades 10. which are set parallel to eachother. and at right angle to the shaft 11. Thereby the teeth of the r0-tary knives, or saws, 9. move at a more or less acute angle to thestationary knife blades 10, and the particles of the materialthe paperstock-are acted upon, so to say,

in two directions: along and across, between the serrated stationaryknife-blades 10, and are thus cut. and simultaneously drawn, or tornapart by the co-action of the rotating, and simultaneously laterallymoving, teeth of the knives 9. and with the teeth of the stationaryknives 10. The cooperation of these shredding implements effects a veryline disintegration of the paper stock.

For conveying the materialpaper sto -kto be shredded, through themachine, a (-onveyer and a set of feed rolls are provided. The conveyercomprises the endless apron 32, stretched over the platform 5, and overthe rolls 30 and 31. The bearings of the roll 30 are fixed; the bearings43 of the roll 31 are movably mounted in suitable guide-ways on theforward extension of the frame 4. Two adjusting screws 42, one for eachbearing, are suitably connected thereto and passed through bores in theflanges 44; correspondingly screw-threaded handwheels 34 are set on theprojecting ends of the screws 42, so that by turning the handwheels 34,the bearings 43 are shifted to stretch. or relax, the endless apron 32over the rolls. A gear wheel 18. meshing with the gear -whee1'19, to bedescribed further on, is keyed to the shaft of the roll 30 to propel theendless apron 32 in the direction, indicated by an arrow, whereby thematerialpaper stockdeposited thereon, is conveyed to, and within reachof, the feed rolls 6 and 7.

It should be noted, that the cooperative arrangement of the conveyer andthe positively driven feed rolls, positively driven independently of theconveyer, as described farther on, also dispenses with the necessity ofproviding, what is known in the art as a doctor blade, the. functionwhereof is to remove from the conveyer accumulations of dust and brokenup particles of the material, in that it prevents the accumulations.This prevention also avoids all crowding, stretching and wear of theendless apron, and secures a constant and uniform conveying of thematerial to the feed rolls.

The lower feed roll 6 is set on a level with the roll 30; it ispreferably made of the same, or very slightly larger, diameter, and fordriving it, at the same proportionate rate of speed, a gear wheel 24 iskeyed to the shaft of the roll 30, the gear wheel engaging with the gearwheel 23, which, in turn, meshes with the gear wheel 29, mounted on thefeed roll 6. By this gear, this feed roll 6 is driven at a speedcorresponding. to the speed of the endless apron.

The upper feedroll is mounted in bearings adjustably set in the end ofarms 46, pivoted on studs 26, and is driven from the shaft 17. Thesprocket wheel 27, mounted on this shaft, is connected by chain 48 withthe sprocket wheel 21, mounted on the stud 26; sprocket wheel 20, whichis made integral with the hub of the sprocket wheel 21, is connected bychain 47 with the sprocket wheel 22, fixed to the shaft of the feed roll6 7. The sprocket wheels 27, 21, 20 and 22 are proportioned to propelthe feed roll at the same relative. speed. or surface velocity, as thefeed roll (3 is rotated.

The positive driving of the feed rolls 6 and 7 is provided to remedy thedisturbing difficulty, heretofore encountered in ma chines of this kind,resulting from the buckling and jamming of the material under the actionof the shredding implements, and to insure a steady and uniform workingof the shredding devices of the machine. By the positive driving of thefeed rolls, a constant and a uniform cooperation of the conveying andfeeding means of the machine with the shredding implements is obtained.By this arrangement the material conveyed to the feed rolls 6 and 7 bythe endless apron 32, is fed to the shredding mechanism constantly anduniformly. and is also held firmly in position against the repellingtendency of the action of the rotary shredding knives, or saw-blades. 9,whereby the frequently recurring interruptions in the operation ofmachines not constructed according to my invention are avoided. Theadvantage thus obtained is further augmented by utilizingthe weight ofthe roll 7 for keeping the materialpaper stockin close contact with, orso to say, compressed between, the feed rolls 6 and 7. whereby it isalso held against the tendency of the rotary shredding knives, or saws,9, to repel (push back) the material from the edge of the stationaryknife 8, and thus cause interruptions of the working of the machine. andeventual breaking of its parts. For this purpose, this feed-roll 7 isjournaled, as explained, in bearings, mounted on the ends of the arms46, whose other ends are, pivoted on the studs 26, and mechanism forlifting it is provided, to facilitate the introduction of the materialbetween the feed rolls, and to avoid interruptions in the workQwhen. asit sometimes happens, overlapping sheets are passed theretlrrough; alsoto permit speedy rearrangement of the parts of the material, as may attimes be necessary.

The mechanism for lifting the feed roll 7 comprises the tread lever 51.fixed to the rock shaft 52, levers 54. also fixed to the rock shaft 52in position directly underneath the arms 46. and rods 53, pivoted to thefree ends of these levers 54. and whose other ends are suitablyconnected to the arms 46, so that by depressing the tread lever 51. theroll 7 is raised.

The highly advantageous results of the described arrangement. and of thepositively driving the feed rolls, and in unison with the conveyer asdescribed. are not obtainable in the stock shredding machines known inprior art, and the frequent interruptions in their operation. fromjamming of'the material and breaking of their operating parts, preventedtheir coming mto more extensive lse. in paper making. The describedimprovements produce a constantly uniform feeding of the material,maintain it firmly in position, and thus insure the proper working ofthe machine, avoiding the frequently occuring interruptions in operating.such machines not constructed according to my invention.

The driving power is imparted to the machine by a belt passing overpulley 12, set on the shaft 11, and which pulley is preferably madeintegral with the fly-wheel 57. This fly-wheel, while not essential, isvery advantageous to be used on this shaft to compensate for thevariations of power, required by the varying resistance of the materialtreated. on the other end of shaft 11, and over pulley 59, keyed to theshaft 17, drives the feeding part of the machine when the idler 60,mounted on stud 61, set in lever 63, is depressed to increase the extentof the contact and the tension of the belt. Gear wheel 19,- mounted onthe shaft, engages with the gear wheel 18, mounted on the shaft of theapron roll 30, and drives it to draw the apron 32 in the direction fromthe roll 31 toward the feed rolls 6 and 7. The gear driving these feedrolls has already been described above.

I claim as my invention:

1. A shredding machine, comprising aframe, a series of stationary, and aseries of rotary, shredding knives mounted in the frame in position toco-act; means for rotating the rotary shredding knives; feed rollsmounted in the frame, adjacent to the shredding knives, and gears,operatively connected with the rotary shredding knives and withthe feedrolls, for positively driving each feed roll independently of the otherbut at the same correlative speed, and proportionate to the speed of therotation of the disintegrating shredding knives; substantially as hereinshown and described.

2. A shredding machine comprising a frame, a series of stationary, and aseries of rotary, shredding knives mounted in the frame in position toco-act; means for rotating the rotary shredding knives; feed rollsmounted in the frame, adjacent to the shredding knives; a conveyor setup in the frame in coiiperative connection with the feed rolls;transmission gears operatively connected with the means for rotating therotary shredding knives, and also with the feed rolls, and with theconveyer, for posi tively driving each feed roll independently of theother, and also the conveyer, at a speed proportionate to the speed ofthe rotary shredding knives; substantially as herein shown anddescribed.

3. A shredding machine comprising a frame, a shaft. a series of circularsaw-like blades mounted on the shaft at an angle deviating from rightangle to the axis of the' A belt, stretched over pulley 58, fixed shaft,and spaced apart by correspondingly shaped washers, the saw-blades andwashers being secured together, and to the shaft, constituting a compactcylindrical shredding implement; feed rolls mounted in fixed bearings onthe frame, a feed roll, mounted in bearings set on a. movable frame, andmeans for moving the feed roll in and out of cooperative position Withthe other feed roll; a conveyor set up in the frame in cooperativeconnection with the feed rolls; transmission gears operatively connectedwith the rotary shredding knives, and also with each of the feed rolls,and With the conveyer, for positively driving each feed rollindependently of the other, and also the conveyer, at a speedproportionate to the speed of the rotating circular shredding blades;substantially as herein shown and described.

4. The combination with mechanism for disintegrating paper stock, andwith means for actuating the mechanism, of a pair of feed rolls, mountedin cooperative position relatively to the disintegrating mechanism, andof gears for positively driving each of the feed rolls independently ofthe other, but at the same correlative speed to the speed of thedisintegrating mechanism; substantially as herein shown and described.

5. The combination with mechanism for disintegrating paper stock, andwith means for actuating the disintegrating mechanism, of a pair of feedrolls rotatably mounted in cooperative position relatively to thedisintegrating mechanism, of gears for positively driving each of thefeed rolls independently of the other, but at the same correlative speedto the speed of the disintegrating mechanism, and of means forcontinuously conveying the material to be operated upon to the feedrolls, at the same rate of speed as the feed rolls are driven;subtantially as herein shown and described.

6. The combination with mechanism for disintegrating dry paper stock,and with means for actuating the disintegrating mechanism, of a pair offeed rolls, rotatably mounted in cooperative position with thedisintegrating mechanism: a conveyer for the dry paper stock to the feedrolls; transmission gears connected with the means actuating thedisintegrating mechanism. and with the feed rolls and with the conveyer,for positively driving each feed roll independently of the other, andalso the conveyer, at a speed correlative to the speed of thedisintegrating mechanism: substantially as herein shown and described.

7. The combination with mechanism for disintegrating dry paper stock.and means for actuating the disintegrating mechanism, of a feed rollrotatably mounted in fixed bearings adjacent to the disintegratingmechanism. and of a feed roll mounted in bearings ailixed to movablesupports above the other feed roll; means for moving. the to the speedof the disintegrating mechasupports; a conveyer for the dry paper stocknism; substantially as herein shown and (le- 1 'J to the feed rolls;transmisslon gears connectscribed.

ed with the means actuating the disinte rat- I j r ing mechanism, andwith the feed rollsfand G130 hY FHER' with the conveyer, for positivelydriving Witnesses:

each feed roll independently of the other, GEO. MCA. GILBERT,

and also the conveyer at a speed correlative S. S. LINNI'JY.

